Help Just need a little help

[Aalnius]

I'm currently on o2 and 'm transferring to 3 network but i need to unlock my phone and i was just wondering could someone point me to a guide or something that would let me do it myself as o2 want

 

[AndroidProf]

The closest I have seen people doing that for free is at
Sim Unlock Guide [Desire C] - xda-developers

but the guide is for HTC Desire C. Though, I still think you should give it a try. Also, local phone repair shops do unlock your phone for a relatively cheaper price.